Amazon Linux 2023 : clamav1.5, clamav1.5-data, clamav1.5-devel (ALAS2023-2026-1870)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2023 Security Advisory ALAS2023-2026-1870.
##

include('compat.inc');

if (description)
{
  script_id(322005);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/22");

  script_cve_id(
    "CVE-2026-41676",
    "CVE-2026-41678",
    "CVE-2026-42327",
    "CVE-2026-44662"
  );

  script_name(english:"Amazon Linux 2023 : clamav1.5, clamav1.5-data, clamav1.5-devel (ALAS2023-2026-1870)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2023 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1870 advisory.

    rust-openssl provides OpenSSL bindings for the Rust programming language.  From 0.9.27 to before 0.10.78,
    Deriver::derive (and PkeyCtxRef::derive) sets len = buf.len() and passes it as the in/out length to
    EVP_PKEY_derive, relying on OpenSSL to honor it. On OpenSSL 1.1.x, X25519, X448, DH and HKDF-extract
    ignore the incoming *keylen, unconditionally writing the full shared secret (32/56/prime-size bytes). A
    caller passing a short slice gets a heap/stack overflow from safe code. OpenSSL 3.x providers do check, so
    this only impacts older OpenSSL. This vulnerability is fixed in 0.10.78. (CVE-2026-41676)

    rust-openssl provides OpenSSL bindings for the Rust programming language.  From  to before 0.10.78,
    aes::unwrap_key() contains an incorrect assertion: it checks that out.len() + 8 <= in_.len(), but this
    condition is reversed. The intended invariant is out.len() >= in_.len() - 8, ensuring the output buffer is
    large enough. Because of the inverted check, the function only accepts buffers at or below the minimum
    required size and rejects larger ones. If a smaller buffer is provided the function will write past the
    end of out by in_.len() - 8 - out.len() bytes, causing an out-of-bounds write from a safe public function.
    This vulnerability is fixed in 0.10.78. (CVE-2026-41678)

    rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.7 to before 0.10.79,
    X509Ref::ocsp_responders returns OCSP responder URLs from a certificate's AIA extension as OpensslString,
    whose Deref<Target = str> wraps the raw bytes with str::from_utf8_unchecked. OpenSSL does not enforce that
    the underlying IA5String is ASCII, so a certificate with non-UTF-8 bytes in its OCSP accessLocation causes
    safe Rust code to construct a &str that violates the UTF-8 invariant -- resulting in undefined behavior.
    This vulnerability is fixed in 0.10.79. (CVE-2026-42327)

    rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.10.0 to before 0.10.79,
    CipherCtxRef::cipher_update, CipherCtxRef::cipher_update_vec, and symm::Crypter::update incorrectly sized
    output buffers when used with AES key-wrap-with-padding ciphers (EVP_aes_{128,192,256}_wrap_pad). For a
    non-multiple-of-8 input, OpenSSL writes up to 7 bytes past the end of the caller's buffer or Vec,
    producing attacker-controllable heap corruption when the plaintext length is attacker-influenced. This
    only impacts users using AES key-wrap-with-padding ciphers. This vulnerability is fixed in 0.10.79.
    (CVE-2026-44662)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1870.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/faqs.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-41676.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-41678.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-42327.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-44662.html");
  script_set_attribute(attribute:"solution", value:
"Run 'dnf update clamav1.5 --releasever 2023.12.20260622' or
  or 'dnf update --advisory ALAS2023-2026-1870 --releasever 2023.12.20260622' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_supplemental", value:"CVSS:4.0/U:Clear");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-41678");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/04/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/22");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav1.5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav1.5-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav1.5-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav1.5-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav1.5-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav1.5-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav1.5-filesystem");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav1.5-freshclam");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav1.5-freshclam-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav1.5-lib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav1.5-lib-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav1.5-milter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamav1.5-milter-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamd1.5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:clamd1.5-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2023");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Amazon Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}

include("rpm2.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var alas_release = get_kb_item("Host/AmazonLinux/release");
if (isnull(alas_release) || !strlen(alas_release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d+|-\d+)", string:alas_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "-2023")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2023", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var pkgs = [
    {'reference':'clamav1.5-1.5.2-1.amzn2023.0.2', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-1.5.2-1.amzn2023.0.2', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-data-1.5.2-1.amzn2023.0.2', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-debuginfo-1.5.2-1.amzn2023.0.2', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-debuginfo-1.5.2-1.amzn2023.0.2', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-debugsource-1.5.2-1.amzn2023.0.2', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-debugsource-1.5.2-1.amzn2023.0.2', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-devel-1.5.2-1.amzn2023.0.2', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-devel-1.5.2-1.amzn2023.0.2', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-doc-1.5.2-1.amzn2023.0.2', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-filesystem-1.5.2-1.amzn2023.0.2', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-freshclam-1.5.2-1.amzn2023.0.2', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-freshclam-1.5.2-1.amzn2023.0.2', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-freshclam-debuginfo-1.5.2-1.amzn2023.0.2', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-freshclam-debuginfo-1.5.2-1.amzn2023.0.2', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-lib-1.5.2-1.amzn2023.0.2', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-lib-1.5.2-1.amzn2023.0.2', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-lib-debuginfo-1.5.2-1.amzn2023.0.2', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-lib-debuginfo-1.5.2-1.amzn2023.0.2', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-milter-1.5.2-1.amzn2023.0.2', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-milter-1.5.2-1.amzn2023.0.2', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-milter-debuginfo-1.5.2-1.amzn2023.0.2', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamav1.5-milter-debuginfo-1.5.2-1.amzn2023.0.2', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamd1.5-1.5.2-1.amzn2023.0.2', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamd1.5-1.5.2-1.amzn2023.0.2', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamd1.5-debuginfo-1.5.2-1.amzn2023.0.2', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'clamd1.5-debuginfo-1.5.2-1.amzn2023.0.2', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  var cves = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
    if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "clamav1.5 / clamav1.5-data / clamav1.5-debuginfo / etc");
}